package com.ce.server.config.security;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.authentication.AnonymousAuthenticationToken;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.web.access.AccessDeniedHandler;
import org.springframework.stereotype.Component;

import java.util.Collection;

/**
 * 判断用户角色
 *
 * @DATE: 2021/11/15 00:34
 * @Author: 小爽帅到拖网速
 */
@Component
public class CustomUrlDecisionManager implements AccessDecisionManager {

  @Override
  public void decide(Authentication authentication, Object o, Collection<ConfigAttribute> configAttributes) throws AccessDeniedException, InsufficientAuthenticationException {

    for (ConfigAttribute configAttribute : configAttributes) {
      // 当前url所需要的角色
      String needRole = configAttribute.getAttribute();
      // 判断角色是否登录即可访问的角色，此角色在CustomFilter中设置
      if ("ROLE_LOGIN".equals(needRole)) {

        if (authentication instanceof AnonymousAuthenticationToken) {
          throw new AccessDeniedException("尚未登录，请登录!");
        } else {
          return;
        }
      }
      // 判断用户角色是否为url所需要的角色
      Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();
      for (GrantedAuthority authority : authorities) {
        if (authority.getAuthority().equals(needRole)) {
          return;
        }
      }

    }

    throw new AccessDeniedException("权限不足，请联系管理员");
  }

  @Override
  public boolean supports(ConfigAttribute configAttribute) {
    return false;
  }

  @Override
  public boolean supports(Class<?> aClass) {
    return false;
  }
}
